Geomagnetic modulation of the 36Cl flux in the GRIP ice core, greenland
Geomagnetic field strength is expected to affect the production rate of cosmogenic isotopes such as beryllium-10, carbon-14, or chlorine-36. Chlorine-36 data from the Greenland Ice Core Project (GRIP) ice core agree well with a production rate calculation based on a paleomagnetic reconstruction for the past 100,000 years over both long- and short-term variations. A chlorine-36 peak at 38,000 years ago previously found in the beryllium-10 record from the Vostok ice core can be explained by a period of low geomagnetic field intensity.
Baumgartner
S
S. Baumgartner, J. Beer, J. Masarik, G. Wagner, Environmental Physics, Swiss Federal Institute of Science and Technology, CH-8600 Dubendorf, Switzerland. L. Meynadier, Laboratoire de Geochimie et Cosmochimie, CNRS 1758, Institut de Physique d.
Beer
J
Masarik
J
Wagner
G
Meynadier
L
Synal
H